Improvement in steam-gage cocks



UNTTnn STATES JOHN BROUGHTON,

OF NEW YORK, N. Y.

IMPROVEMENT IN STEAM-GAGE COCKS.

Specification forming part of Letters Patent No. 52,52 E dated February13, 1866.

To all fuhom it may concern:

Be it known that l, JOHN BROUGHTON, of the city, county, and State ofNew York, have invented a new and useful Improvement in CompressionGage-Cocks; and I do hereby declare that the followingis a full, clear,and exact description thereof, which will enable others skilled in theart to make and use the same, reference being had to the accompanyingdrawing, forming part of this specification.

The drawing, consisting of only one ligure, is a longitudinal elevationot' the cock, partly in section, showing the arrangement entire with thevalve closed. v

A is the globe or body of the cock, and B its shank, which is screwedinto any boiler to which the cock is to be applied.

O is the outlet-passage, communicating with the boiler through theshank.

d is the discharge-passage through the nozzle e.

F is a cylindrical and conical pointed valve, passin g through andsupported in a correspending opening made through the front portion ofthe body A, and is free to move in a longitudinal direction, and also torotate on its axis. Said valve is provided at its outer end with aprojecting head, whose exterior end is made convex or rounding, whileits interior surface forms a shoulder in connection with the stem of thevalve. Between this shoulder l and the outer end of the body A a spiralspring, J, is placed, which, when the valve is closed, as shown in thedrawing, is in a compressed condition.

G is a tubular cap, provided at one end with a flange, to which isattached a wooden knob or handle, H, and at the other with an internalscrew-thread, which screws onto an external one on the outer end of thebody A.

The valve F being free to move in a longitudinal direction when thetubular cap Gis screwed onto the end ofthe body A, its inner surface, K,is brought in contact with the outer convex head of valve F and forcesthe valve forward until its opposite end enters the conical seat in thebody A, and thus closes the outlet-passage communicating with theboiler. By reversing the motion of the handle H and cap Gr, as in theact of unscrewing, the valve E will be free to move in a contrary ldirection, and will be opened by the pressure within the boiler actingon its inner end and by the action of the spiral spring at its outerend. When steam is up or there is pressure within the boiler the.actionv ot' said spiral spring is not required to open the valve; but itis placed on the valve as an independent means 'ot' openingl it whenthere is no pressure within the boiler, its action being` constantandtending to force the valve outward in a longitudinal direction, andthus to withdraw it from its conical seat, when the tubular cap G isslightly unscrewed or slacked back.

One of the objects of this invention is, first, to arrange and constructa gage-cock in suoli manner that while it is simple both inrconstruction and operation the valve may be reground to its seat whenit becomes leaky without disturbing the joint connecting it with theboiler, and without the use of tools of any kind or description.I rlhisis effected by the arrangement ot` the body A, detached valve F, andtubular cap Gr. By unscrewing the cap G from the body A by hand, as inthe act of opening the cock, the outer end of valve F is exposed, and isfree to be withdrawn by finger and thumb from the body'A. Itis then freealso to be rotated on its axis, which may be done by taking hohl of itsouter end with the nger and thumb. Thus b v taking ott' the cap Gr thevalve may be withdrawn and examined at any time., and may be regroundand thecap replaced in a few minutes and without the use of toolsof anykind.

Another object is, second, to construct a compression gage-cock in suchman-ner that while its valve is free to move in a longitudinaldirection, so that it may at any time be withdrawn, and while it is alsofree to rotate on its axis, so that it can be reground, yet the saidvalve will not rotate on its seat in the act of closing. This iseffected by rounding the outer Aend or head of valve F and making thepart of its surface which is in contact with the inner surface of cap Gapproximate to a pivot. When the cap G is rotated the valve F is forcedforward until it rests on its conical seat, and the surfaces in contactat that end being comparatively large and spread out to some distancefrom the. axis of the valve, while the surfaces in contact between theother end of the valve and the cap G are conto pack the said stem ut itsouter end 21ndl ndnlit ofthe cock being operated under highpressurewithout the possibility of scolding the hund ot' the operator. This iseffected by the 'fnrangement ot' the tubular cap Gr in connection withthe valve F und body A. The outer end ot'valve F, which projects beyond'its bearing in the body A, is the portion ot' the stem usually packedby n stufling-box in gage-cocksof the ordinary construction to bensedunder high pressure; but since it is in my improvement surrounded undcovered by the tubular carp G, no steun] or water can be blown outl in nforward direction, and should the screw connecting" the cap with thebody become rather loose, so as to allow a slight escape of vapor, itwould be discharged backward or in a direction from the hand ot' theoperator toward the boiler.

l claim as new and desire to secure by Letters Patentv l. ln combinationwith the body and shank ot' u gage-cock provided with u suitableoutlet-passage, :L detachable valve, when said `vulve is supported byand has its bearing' in snid body independent of the operating; han dieor screw, substantially as set forth.

L. In u compression gage-cock provided with n detachable und independentvulve sup ported by and having its hearing in the body thereof, thetubular cap whereby to operate the valve F, substantially :Ls set forth.

3. The comiiinntion ofthe body A, detachnble valve F, und tubular capGr, when nrrang'ed und constructed substanti-(illyns set forth.

M. M. LIVINGSTON, C. L. TOPLIFF.

